# This module finds the Ruby package and defines a ADD_RUBY_EXTENSION macro to # build and install Ruby extensions # # Upon loading, it sets a RUBY_EXTENSIONS_AVAILABLE variable to true if Ruby # extensions can be built. # # The ADD_RUBY_EXTENSION macro can be used as follows: # ADD_RUBY_EXTENSION(target_name source1 source2 source3 …) # #

FIND_PACKAGE(Ruby) IF(NOT RUBY_INCLUDE_PATH)

MESSAGE(STATUS "Ruby library not found. Cannot build Ruby extensions")

ELSEIF(NOT RUBY_EXTENSIONS_AVAILABLE)

SET(RUBY_EXTENSIONS_AVAILABLE TRUE)
STRING(REGEX REPLACE ".*lib(32|64)?/?" "lib/" RUBY_EXTENSIONS_INSTALL_DIR ${RUBY_ARCH_DIR})
STRING(REGEX REPLACE ".*lib(32|64)?/?" "lib/" RUBY_LIBRARY_INSTALL_DIR ${RUBY_RUBY_LIB_PATH})

FIND_PROGRAM(RDOC_EXECUTABLE NAMES rdoc1.9 rdoc1.8 rdoc)
FIND_PROGRAM(YARD_EXECUTABLE NAMES yard)

EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "puts RUBY_VERSION"
   OUTPUT_VARIABLE RUBY_VERSION)
STRING(REPLACE "\n" "" RUBY_VERSION ${RUBY_VERSION})
message(STATUS "using Ruby version ${RUBY_VERSION}")

EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "puts RbConfig::CONFIG['CFLAGS']"
   OUTPUT_VARIABLE RUBY_CFLAGS)
STRING(REPLACE "\n" "" RUBY_CFLAGS "${RUBY_CFLAGS}")
set(RUBY_CXXFLAGS "${RUBY_CFLAGS}")
string(REPLACE "-Wdeclaration-after-statement" "" RUBY_CXXFLAGS "${RUBY_CXXFLAGS}")
string(REPLACE "-Wimplicit-function-declaration" "" RUBY_CXXFLAGS "${RUBY_CXXFLAGS}")

MACRO(ADD_RUBY_EXTENSION target)
    list(GET RUBY_INCLUDE_PATH 0 ruby_path)
    GET_FILENAME_COMPONENT(rubylib_path ${ruby_path} PATH)
    LINK_DIRECTORIES(${rubylib_path})

    INCLUDE_DIRECTORIES(${RUBY_INCLUDE_PATH})
    SET_SOURCE_FILES_PROPERTIES(${ARGN} PROPERTIES COMPILE_FLAGS "${RUBY_CXXFLAGS}")
    ADD_LIBRARY(${target} MODULE ${ARGN})
    target_link_libraries(${target} ${RUBY_LIBRARY})
    SET_TARGET_PROPERTIES(${target} PROPERTIES PREFIX "")
ENDMACRO(ADD_RUBY_EXTENSION)

ENDIF(NOT RUBY_INCLUDE_PATH)